Why GK Pro is the Ultimate Choice for a Professional Patio Cleaner

Whether you’re a professional exterior cleaner looking for a reliable, high-yield biocide or a homeowner tired of seeing your stone surfaces succumb to green algae and black lichen, you know that not all cleaners are created equal.

When searching for a professional patio cleaner, the market is flooded with harsh bleaches and high-pressure washing services that often do more harm than good. At GK Products, we believe in a better way. Enter GK Pro, the high-concentration, DDAC-based biocide that is redefining standard industry practices.

Here is why GK Pro is the superior choice for restoring and maintaining your outdoor spaces.

1. The Power of DDAC (Didecyl Dimethyl Ammonium Chloride)

At the heart of any effective professional patio cleaner is its active ingredient. Most DIY products use weak concentrations of sodium hypochlorite (bleach), which is aggressive, toxic, and offers no residual protection, or the weaker form of DDAC, BAC (Benzylammonium chloride).

While both are derived from soya beans and serve as biocides, their purity and performance in real-world applications set them worlds apart, much like comparing a single malt whisky to a blend, or extra virgin olive oil to standard olive oil.

GK Pro uses high-grade DDAC, a powerful biocide that doesn't just ‘burn’ off surface algae but targets the biological root of the problem.

Deep Penetration: It reaches into the pores of the stone to kill spores, not just surface growth.

Residual Protection: Unlike bleach, which evaporates instantly, DDAC leaves a microscopic barrier that prevents premature regrowth, keeping your patio cleaner for months (and even years) longer.

Learn more about why DDAC biocide makes GK Pro the superior choice here.

2. Unbeatable Coverage and Economy

For a professional exterior cleaner, profitability is driven by coverage and dilution rates. GK Pro is one of the most concentrated products on the market.

Dilution: A single 5L bottle can be diluted up to 1:50.

Yield: One bottle makes up to 300L of usable product.

Coverage: It can treat up to 1,000m² of surface area.

This makes it an incredibly cost-effective solution for large-scale commercial projects, housing estates, or extensive residential driveways.

3. Gentle 'Soft Washing' Over Aggressive Pressure Washing

We’ve all seen the damage caused by ‘cowboy’ cleaners using high-pressure jet washes on delicate natural stone. It strips the mortar, damages the stone's surface, and actually makes the stone more porous, encouraging algae to return faster.

GK Pro is designed for a low-pressure application.

Self-Cleaning Action: Once applied, the product works with the natural weather cycles. Rain and UV rays help break down the dead biological matter, washing it away naturally over time.

Surface Safe: It is safe for almost any hard substrate, including sensitive Indian Sandstone, Limestone, Render, and even historic thatch or slate.

4. Safety and Environmental Responsibility

Many professional patio cleaners contain harsh acids or ammonia that can damage lead work, UPVC windows, and garden plants.

Non-Oxidising: GK Pro does not oxidise, meaning it won't rust your garden furniture or damage your window seals.

HSE Approved: It is a fully licensed and HSE-approved product (no. 10766), ensuring it meets the highest safety standards in the UK.

Plant & Pet Safe: Once dry, GK Pro is safe for children and pets. It is also plant-safe, while direct spraying should be avoided, accidental overspray won't kill your lawn if rinsed down with water.

5. Professional Results for Every Surface

While we focus on its role as a professional patio cleaner, GK Pro is a versatile multi-tool for exterior maintenance. It is equally effective on:

• Roofs: Killing moss and lichen without the need for scraping.
• Render: Removing "Red Algae" staining safely.
• Driveways: Cleaning tarmac and block paving without degrading the binder.
• Tennis Courts & Astroturf: Keeping sports surfaces slip-free.

Key Features of GK Pro

Versatile Hard Substrate Use: Suitable for almost any hard substrate (excluding green or sedum roofs), making it ideal for historic and fragile surfaces, including thatch.

Gentle Low-Pressure Application: Applied at low pressure, GK Pro minimises the risk of damage often associated with harsh scouring, scrubbing, or water blasting.

Chemical-Free Assurance: Free from harsh chemicals found in bleach-based cleaners, GK PRO, when used as instructed, does not oxidise or negatively impact hard surfaces, including lead works, UPVC windows, and seals.

Effective Sanitisation: Acts only on living cells, serving as an effective sanitising agent for 99.9% of bacterial matter.

HSE Certification: Following a routine check from the HSE (no.10766), we confirm that our product formulation aligns with the stated information.

Application Guidelines

GK Pro is a professional cleaning agent - conversation with your preferred GK Pro applicator will determine the right course of action for your property.

GK Pro should be applied during a dry, relatively wind free day with no likelihood of rain for at least four hours, and in temperatures above 5°c.

A spray treatment with GK Pro works in conjunction with natural weather cycles of UV, to desiccate the now dead, bacterial staining while rain will remove the powdery residue. This process, being weather driven, can take many weeks before your building will look 'as new', but the process is predictable, and it will happen.

GK Pro vs K-Seal Max-Strength Patio Cleaner

K-Seal Max-Strength Patio Cleaner relies on hydrochloric acid, commonly known as brick acid. While hydrochloric acid does a decent job of dissolving mineral deposits like mortar, rust, and efflorescence, its high corrosiveness comes at a steep cost.

This harsh acid can etch and permanently damage concrete, natural stone, and coloured paving. The result? Altered colour and texture, unsightly pits, dull spots, blotches, and a worrying increase in surface porosity.

What Makes GK Pro Different

GK Pro is the superior choice for professional patio cleaning, primarily because of its active ingredient, Didecyl Dimethyl Ammonium Chloride (DDAC). This professional-grade quaternary ammonium compound is essential for ‘soft washing’ patios, paths, and decking.

DDAC powerfully eliminates and prevents the regrowth of common contaminants like algae, lichen, mould, and fungi by breaking them down at the source, offering a far more durable and long-lasting cleaning result.

DDAC is generally non-corrosive, non-staining, and non-acidic, making it safe for most hard surfaces including wood, plastic, concrete, and stone.

Ready to Experience the GK Pro Difference?

Whether you are looking to scale your exterior cleaning business or simply want the best possible results for your own home, GK Pro is the answer. It offers the precision of a professional sanitiser with the ease of a simple spray-and-leave application.

Shop GK Pro 5L here and take the first step toward a cleaner, longer-lasting patio.